@article{MAN_1988__280_3_164383,
     author = {N. Hadjisavvas and Nassopoulos B.},
     title = {On the {Renorming} of a {Vector} {Space} {Endowed} with {Two} {Norms} and the {Simultaneous} {Best} {Approximation} {Problem.}},
     journal = {Mathematische Annalen},
     pages = {549--558},
     publisher = {mathdoc},
     volume = {280},
     number = {3},
     year = {1988},
     zbl = {0616.41016},
     url = {http://geodesic.mathdoc.fr/item/MAN_1988__280_3_164383/}
}